/**
 * #      3
 * 名称   无重复字符的最长子串
 * 链接   https://leetcode-cn.com/problems/longest-substring-without-repeating-characters
 * 题解   [5412](https://leetcode-cn.com/problems/longest-substring-without-repeating-characters/solution)
 * 通过率 36.8%
 * 难道   中等
 */

